An array of one or more integrated circuits includes at least one local input port to receive a chirp signal from a local generator; one or more primary input ports to each receive a respective chirp signal from a remote source; a primary switch arrangement operable to switch between the chirp signals from the at least one local input port and the one or more primary input ports to produce a composite signal having a chirp sequence with at least one chirp that begins during a settling period of a previous chirp; and one or more primary output ports to supply a local oscillator signal to a transmitter and a receiver based on the composite signal. The roles of master circuit and follower circuit can change during operation of the array.